Re: real-time priority

[Frank Rowand <frank.rowand@am.sony.com>]

Rodrigo Amestica wrote:
> Hi,
> 
> general questions from somebody who's just starting to look into the
> preempt patch.
> 
> the article linked below makes direct reference to the behavior of the

The link is missing.


> preempt rt patch. The article was written in 2007. How much of that
> still holds true in the current version of the patch?
> 
> I'm basically wondering about the first sentences in the abstract of
> that article. The big picture seems to be rather simple: calls to
> specific linux services could break the performance of a real time task
> by depending on lower priority tasks to complete that service.
> 
> Does this mean that one must always be alert to which system services
> are invoked during the execution of a real time task? Does the vanilla
> kernel or the preempt-rt patch tries to somehow detect this condition
> and alert somehow?
> 
> thanks,
> Rodrigo
> 
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